The big day is here for Kiss bassist Gene Simmons and his longtime love Shannon Tweed! The duo will finally and officially exchange vows after 28 years and two children together. Miss Tweed is making an honest man out of the Demon. While we (and Gene himself) were left hanging after he popped the question last season during the cliffhanger of their reality show 'Family Jewels,' the wedding invites surfaced online and their future of wedded bliss seemed set.

However, the drama doesn't stop nor are the couple's fundamental problems fixed by slipping rings on one another's fingers and making it legal. In a preview clip of the coming season, the couple faces prenuptial issues and we're left to wonder if Simmons is afflicted with a case of cold feet. There's also a clip of the couple discussing fidelity questions. Tweed says "He doesn't promise to be faithful," to which Simmons replies, "I'll do my best." Let's hope big Gene's best is good enough!

In a recent chat with 'Entertainment Tonight,' Simmons, 62, offered a simple and logical explanation as to why he would be taking himself off the market at this point in his relationship with Tweed. He said "28 years is long enough to go out on a date," while Tweed said that "it's the longest bachelor party known to mankind." Simmons did say "be very afraid," as well.

"It is time for me to grow up," he said about his desire to change and legalize their arrangement. "I’ve been doing a lot of wacky stuff for an awfully long time — the band, traveling around the world and all that. There’s nobody I’ve ever loved. There’s nobody I’ve ever said ‘I love you’ to. I even find it difficult to say ‘I love you’ to my mother, but I love Shannon with all my heart and all my soul and always will.” That almost brought a tear to our eye!

Simmons also told ET that the ceremony, which is taking place at the Beverly Hills Hotel, requires him to be on his best behavior. Tweed told Simmons he better not make any jokes at the altar or he'd risk getting a knuckle sandwich. Simmons promised to zip it! “If you ask my opinion I’ll tell you, but otherwise I won’t say anything," he said.

The upcoming season of 'Family Jewels' will center on the wedding and its aftermath and impact. The new season starts on Oct 4 at 9 PM ET.

Watch Gene Simmons and Shannon Tweed's Pre-Wedding Chat